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Mannich condensation products useful as sequestering agents

a technology of sequestering agent and condensation product, which is applied in the direction of liquid carbonaceous fuels, lubricant compositions, fuels, etc., can solve the problems of acid catalytic reaction and rearrangement of oil, wear and corrosion, and impair the efficiency of these elements, so as to prevent metal ion catalytic oxidation and polymerization reactions, and sufficient oil solubility

Active Publication Date: 2006-10-19
CHEVRON ORONITE CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0065] Among other factors, the present invention is based upon the discovery that the Mannich condensation products of the present invention are effective in sequestering metals, especially Fe+3, and preventing metal ion catalyzed oxidation and polymerization reactions, while maintaining sufficient oil solubility for use in lubricating oils and fuels.

Problems solved by technology

These acids can cause wear and corrosion, and can cause acid catalyzed reactions and rearrangements to occur in the oil.
Such deposits and varnish impair the efficiency of these elements.
In addition, fuels are susceptible to chemical reactions, such as, oxidation, on aging.
One effect of oxidation is to produce soluble and insoluble materials that form deposits which interfere with the proper functioning of the internal combustion engines.
These products have limited ability to sequester Fe+3 and have limited ability to prevent the Fe+3 catalyzed oxidation and polymerization that often occur.
However, such products cannot be used as sequestering agents in fuels and lubricating oils.
However, none of the known Mannich condensation products contain both the needed oil solubility and the ability to sequester Fe+3 to prevent Fe+3 catalyzed oxidation and polymerization reaction in lubricating oil.
Left untreated, such iron species lead to decomposition resulting in the formation of gummy, polymer masses in the hydrocarbon liquid.
Left untreated, such species lead to decomposition resulting in the formation of gummy, polymer masses in the hydrocarbon liquid.

Method used

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  • Mannich condensation products useful as sequestering agents
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Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Mannich Condensation Product Using 1,000 Molecular Weight Polyisobutyl-Substituted Phenol

[0160] To a 1.0 liter three-neck flask equipped with a temperature probe, mechanical stirrer and reflux condenser were added 4.0 grams of sodium hydroxide in 3.0 milliliters of water (0.1 moles), 300 milliliters of methanol (boiling point 65° C.), 7.5 grams (0.1 moles) of glycine and 6.59 grams (0.2 moles) of paraformaldehyde. The reaction mixture was gently warmed (40° C.) for 30 minutes. To this was added, at a reflux temperature, 134.8 grams (0.1 moles) of 1,000 molecular weight polyisobutyl-substituted phenol, prepared as described in U.S. Pat. Nos. 5,300,701 and 6,274,777, (hydroxyl number 41.6 milligrams KOH per gram sample) diluted in C9 aromatic solvent The reaction mixture was heated at reflux temperature for 17 hours. Next the methanol was removed under vacuum and the product obtained.

[0161] This product was soluble in diluent oil. The product had a viscosity of 1,653 ...

example 2

High Temperature PCDO Performance VW TDI-1 Engine Test Using 10w40 Oil

[0164] The performance of a sample of the Mannich condensation product prepared in Example 1 was evaluated in a VW TD-1 Engine Test and compared to a fully formulated oil without the Mannich condensation product. The product prepared in Example 1 was added at a 1.0 percent treat rate to a fully formulated oil containing typical amounts of ashless dispersant, phenate, overbased sulfonate, LOB sulfonate zinc di-thiophosphate, wear inhibitors, etc., in a SAE grade 10W40, partial synthetic oil. The results of the VW TDI-1 Engine Test are summarized below in Table II. The data show that the oil containing the Mannich condensation product of the present invention had significantly better performance that the baseline oil. The baseline oil ran for only 42 hours and was terminated early. The average piston merit was 60.6, and the average ring sticking was 2.0. This was a failing engine test. The oil containing the Mannic...

example 3

High Temperature PCDO Performance VW TDI-2 Engine Test Using 5w30 Oil

[0165] The performance of a sample of the Mannich condensation product, prepared in Example 1 dissolved at 1.0 percent level in a fully formulated Group III 5w30 baseline oil, was determined in a VW TD-2 Engine Test. This was compared to the baseline oil without the Mannich condensation product. The results of the VW TDI Engine Test are summarized below in Table III. The data show that the oil containing the Mannich condensation product of the present invention had significantly better performance than the baseline. The oil containing the Mannich condensation product of the present invention performed better for average piston cleanliness and there was no ring sticking. It is believed that the Mannich condensation product of the present invention performed better than the Group III Base Oil alone because of the product's ability to sequester metal ions, thus preventing metal ion catalyzed oxidation and polymerizat...

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Abstract

The present invention is directed to Mannich condensation product sequestering agents or mixtures of Mannich condensation product sequestering agents for use in fuels and lubricating oils. The present invention is also directed to a process for preparing the Mannich condensation product sequestering agents. The present invention is also directed to a product formed by combining, under reaction conditions, a polyisobutyl-substituted hydroxyaromatic compound, an aldehyde, an amino acid or ester thereof, and an alkali metal base to form the Mannich condensation product sequestering agent. The present invention is also directed to a lubricating oil composition, a lubricating oil concentrate, a fuel composition, and a fuel concentrate having the Mannich condensation product sequestering agents of the present invention.

Description

FIELD OF THE INVENTION [0001] The present invention is directed to Mannich condensation product sequestering agents or mixtures of Mannich condensation product sequestering agents for use in fuels and lubricating oils. The present invention is also directed to a process for preparing the Mannich condensation product sequestering agents. The present invention is also directed to a product formed by combining, under reaction conditions, a polyisobutyl-substituted hydroxyaromatic compound, an aldehyde, an amino acid or ester thereof, and an alkali metal base to form the Mannich condensation product sequestering agent. The present invention is also directed to a lubricating oil composition, a lubricating oil concentrate, a fuel composition, and a fuel concentrate having the Mannich condensation product sequestering agents of the present invention. BACKGROUND OF THE INVENTION [0002] Lubricating oils contain additives that perform many important functions. Ashless dispersants are added to...

Claims

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Application Information

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IPC IPC(8): C10M159/16
CPCC08F8/32C10M133/08C10L10/04C10M159/16C10M169/045C10M2207/027C10M2217/043C10M2219/046C10M2223/045C10N2220/02C10N2230/04C10L1/238C10L1/2235C08F10/10C10N2020/01C10N2030/04
Inventor HARRISON, JAMES J.NELSON, KENNETH D.
Owner CHEVRON ORONITE CO LLC
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